100033111921 has 2 divisors, whose sum is σ = 100033111922. Its totient is φ = 100033111920.

The previous prime is 100033111909. The next prime is 100033111931. The reversal of 100033111921 is 129111330001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90372384400 + 9660727521 = 300620^2 + 98289^2 .

It is a cyclic number.

It is not a de Polignac number, because 100033111921 - 2³⁵ = 65673373553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100033111892 and 100033111901.

It is not a weakly prime, because it can be changed into another prime (100033111931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50016555960 + 50016555961.

It is an arithmetic number, because the mean of its divisors is an integer number (50016555961).

Almost surely, 2^100033111921 is an apocalyptic number.

It is an amenable number.

100033111921 is a deficient number, since it is larger than the sum of its proper divisors (1).

100033111921 is an equidigital number, since it uses as much as digits as its factorization.

100033111921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

Adding to 100033111921 its reverse (129111330001), we get a palindrome (229144441922).

The spelling of 100033111921 in words is "one hundred billion, thirty-three million, one hundred eleven thousand, nine hundred twenty-one".